Guest WESTCORT Posted July 6, 2004 Share Posted July 6, 2004 id say a pod filter and an exaust system would give you more than 0.01... Quote Link to comment Share on other sites More sharing options...
trunk-rattlin Posted July 6, 2004 Share Posted July 6, 2004 with out a doubt it would. havnt u seen those adds in magazines for hi tech muffflers i think, give the wrx 25kw and the s15 20kw or somfing like that Quote Link to comment Share on other sites More sharing options...
Toucan Posted July 6, 2004 Share Posted July 6, 2004 GNR - Yea I just used the pod filter thing example, I got no idea what sort of hp increase it makes. jaymz - nah I didnt do a port and polish, the only thing I did to the head was take out each of the valves and re-seat them, its real easy to do with a cordless drill and some valve grinding paste but it is more of a reconditioning thing than a performance thing which is what most of you will be after. Be careful if you try to do it though because the intake side of the head is meant to have a rough surface to a certain degree, I wasnt too sure how to do it so I just left mine as is. Quote Link to comment Share on other sites More sharing options...
Snoozin Posted July 7, 2004 Share Posted July 7, 2004 The increase an exhaust will give to a turbo car like a WRX or an S15 is mauch much more than the same exhaust applied to an NA car. Trubo's rely on having a freer flow to produce more boost.... whereas the variables regarding an NA engine ar a little more complicated, such as length of primary, secondary pipes in extractors, what types of resonators/mufflers etc etc. So simply bunging a filter and larger exhaust on an NA car may not give you a power increase at all really - I found that when twin pod filters were put on the DHLA40 Dellortos on the Alfa, it actually lost power and torque, due to the fact that we effectively lost the velocity the intake runners were adding to the air as it was sucked into the carbs. With some trumpets inside it may well have proved to increase power, but I elected to stick with the K&N panel filter. Matching an exhaust to your head and engine mods is important if you are expecting to get any kind of noticable performance gain. Quote Link to comment Share on other sites More sharing options...
jaymz Posted July 10, 2004 Share Posted July 10, 2004 so after grinding the ports on the inlet side of the head do you run that "honing" thing through again to give it a cross stitch finish? With the exhaust more enigine output needs a bigger exhaust to let the gases escape. When you do more work to your engine you need a bigger exhaust bigger carbs let more air in (intake) so then you need it all to exit (exhaust) so then you need a bigger exhaust pipe. something like that anyway. Quote Link to comment Share on other sites More sharing options...
Toucan Posted July 11, 2004 Share Posted July 11, 2004 I only used the honing tool to remove the ridge that forms on the top of each cylinder so that I could fit new rings. I didnt use it on the head so I'm not too sure?? Quote Link to comment Share on other sites More sharing options...
Jerm Posted July 13, 2004 Author Share Posted July 13, 2004 yeha i think you hone the cylinders to make sure they are smooth so the rings can go in Quote Link to comment Share on other sites More sharing options...
BigDave Posted July 13, 2004 Share Posted July 13, 2004 You normally just hone your bores if they go out of round. Its basically just a very slight machining to get things back sweet again. You will probably also need oversized pistons afterwards?? Opening up ports on your head is "normally" done with a burr type tool and by hand slowly. You are better getting them wider and also taking off any rough edges or steps to get free flowing gases. You can also dowel your manifolds in place to ensure they keep matched. CheeRS Dave... Quote Link to comment Share on other sites More sharing options...
jaymz Posted July 14, 2004 Share Posted July 14, 2004 sweet as, how do i know how much to grind out? do i need to measure the radius of my manifolds and then mark onto the head the size? Quote Link to comment Share on other sites More sharing options...
BigDave Posted July 14, 2004 Share Posted July 14, 2004 Opening and smoothing of all internals helps yeah, but be careful you dont go crazy, especially on the inlet side of things. There are all kinds of crazy pysics type factors such as air venturis that can alter your flow. What you basically need to do is open it all up, keep everything even and symetrical, and make it easier for air/fuel mix to flow. I have some pics of opened up heads on my cars some place, giz a mo... Quote Link to comment Share on other sites More sharing options...
BigDave Posted July 14, 2004 Share Posted July 14, 2004 Just got Exhaust pics at the moment so here goes... N/A Cossie YB Lump BDA Also dont forget that you will; have to fit larger manifolds and open up the gaskets when refitting! CheeRS Dave... Quote Link to comment Share on other sites More sharing options...
jaymz Posted July 15, 2004 Share Posted July 15, 2004 sweet as thanks for that, hopefully i don't bugger up my head, it's just had a tinkering with at the shop. Quote Link to comment Share on other sites More sharing options...
two_days_late Posted July 20, 2004 Share Posted July 20, 2004 the stroke on the 1300 escort motor is more square which makes it better than the 1600 but not more powerfull. its like its better for a 1300 than the 1600 is for a 1600 but the 1600 is still a lot more powerfull and unless your building a competion car that has a cc limit of 1300 then you are completly wasting your time with it. the 1300 pistons can be put into the 1600 block and this raises the compression to 10.5 from memory, and you may have to run it with double head gaskets to aviod blowing your motor, unless your running it on race fuel, coz we all know NZ gets shitty B grade fuel. if your gona port it yourself you have to make sure the exaust ports are bigger than the inlet ports, honestly your much better to take it to a machine shop and they will port it to match your manifolds. those bullshit add's in performace car magazine can boast 20kw increase on wrx's by just adding an exaust because the factory manifolds have restrictor plates in them to stay under the kw limit they have on jap cars. so by puttin on a new exaust will increse them by that much, but obviously the old esky dosnt have restrictor plates so i wouldnt expect 20kw extra, but extractors are cheap and do make a differnce. Quote Link to comment Share on other sites More sharing options...
Mr.Mk1 Posted July 21, 2004 Share Posted July 21, 2004 I hope my ezza has restrictor plates Quote Link to comment Share on other sites More sharing options...
Guest WESTCORT Posted July 21, 2004 Share Posted July 21, 2004 why do they limit there power? always wondered this, its like 206 or 207 kw right? Is it sum strange law that they have to comply with? i mean even those honda nsx's have like the limit, and they cost heaps, but i suppose the power would start real early and continue all through the range on those things mayb Quote Link to comment Share on other sites More sharing options...
two_days_late Posted July 21, 2004 Share Posted July 21, 2004 im not sure why its limited, guess they have to control it somehow haha. thats why the new focus puts out more KW than the new WRX's and that coz theres no limit that im aware of for uk cars. crazy law really haha. Quote Link to comment Share on other sites More sharing options...
Jerm Posted July 22, 2004 Author Share Posted July 22, 2004 yeah japs have all sorts of rules in place for all cars that get exported........apparently the skyline gtrs make more power than they are aloud but they just say it is lower Quote Link to comment Share on other sites More sharing options...
GNR Posted July 22, 2004 Share Posted July 22, 2004 yeah japs have all sorts of rules in place for all cars that get exported........apparently the skyline gtrs make more power than they are aloud but they just say it is lower thats the same with the Subaru WRX 22b, they underated the hp, but thats jsut a rumour my mate has a 22b, what a rich boy Quote Link to comment Share on other sites More sharing options...
Guest WESTCORT Posted July 22, 2004 Share Posted July 22, 2004 i saw a 22b in autotrader for $90k, id rather have a 90k escort thank you very much was there only 500 of those made? Quote Link to comment Share on other sites More sharing options...
Toucan Posted July 23, 2004 Share Posted July 23, 2004 Yea I think I read that there were only 500 made... I think I read it on Gran Turismo Quote Link to comment Share on other sites More sharing options...
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